Sunday is the best day to get out into nature (for those who live in the city), organise the next weeks meals/food and to do lists. It is the best thing to do because then you don't waste money on takeouts, when you can't be bothered thinking about what you to make. You start the week fresh and happy from being around nature and organised with your to do lists ready to be ticked off.
When I head out of the house on Sunday's I will always be wearing something simple and easy to relax in. A nice white shirt paired with yummy denim jeans and a stylish pair of walking shoes. I love to walk or bike most places (it is so peaceful and calming) so I always need good shoes on my feet.
Have you tried doing these things on your Sunday? If not give it a try you won't feel stressed or unhappy.